advice needed for neighbour issue

John from Sunnynook

My neighbour came into our yard to cut some plants without our conscent. The plants were planted out of both their and our yard but the branches were growing into our yard, and some of those branches were climbed onto their deck. He left all cutted leaves and branches in our yard and said they helped us to cut them because those plants were belong to us. They said they will clean the branches they cut by next Tuesday after we argued with them. Meanwhile,we found that he broke one small tree we planed in our yard few years ago. Can anyone give some advices that what we can do next? What can we do if they dont clear the leaves and branches before Tuesday. Do we have the right to ask them clean our yard immidiately? Thank you for any advice.